4eBooks has a huge collection of computer programming ebooks. Each downloadable ebook has a short review with a description. You can find over thousand of free ebooks in every computer programming field like .Net, Actionscript, Ajax, Apache and etc.

ManyBooks provides free ebooks for your PDA, iPod or eBook Reader. You can randomly browse for a ebook through the most popular titles, recommendations or recent reviews for visitors. There are 21,282 eBooks available here and they’re all free!

FreeComputerBooks consists of a huge collection of free online Computer, Programming, Mathematics, Technical Books, Lecture Notes and Tutorials. It is very well categorized by topics, with 12 top level categories, and over 150 sub-categories.

FreeTechBooks lists free online computer science, engineering and programming books,textbooks and lecture notes, all of which are legally and freely available over the Internet. Throughout FreeTechBooks, other terms are used to refer to a book, such as ebook, text,document, monogram or notes.